I have to replace a 4 ton home air conditioning unit. Is there a website which compares and/or rates the efficiency of these units? Consumer Reports does not evaluate central air systems... Thanks

Don't know, but the higher the SEER (Seasonal Energy Efficiency Rating) the lower the cost to operate. In order to obtain this rating all of the manufacturer's parts must be used. Sometimes a different manufacturer's evaporator is used.

Central Air Conditioners Reviews: Best Central Air Conditioners (http://www.consumersearch.com/www/house_and_home/central-air-conditioners/)

For Homeowners & Building Managers (http://www.acca.org/consumer/)


Central Air Conditioners : ENERGY STAR (http://www.energystar.gov/index.cfm?c=cac.pr_central_ac)

One thing to think about is if you buy a new 16 seer air conditioner and hook it up to a old 10 seer air handler you don't have a A/C rated at 16 seer any more. The seer is rated at what it is capable of when matched up right with all equipment.